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controlled expansion alloy

Name: controlled expansion alloy
Brand: kovar alloy
Availability: InStock

FOB Price

USD $29.00 - $29.00 / Piece

5 Pieces(Min.Order)

Supply Ability 2147483647 Kilogram / Kilograms per Month
Port xi'an
Payment TermsT/T

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Product Details

Place of Origin	Shaanxi, China	Brand Name	kovar alloy
Model Number	4j29	Type	Other, expandable alloy
Composite	Other, Ni-Fe-Co	Shape	Bar
Application	Industrial Magnet

Product Description

Kovar Alloy, also know as ASTM F-15, NILO K, Pernifer 2918, Rodar, and Dilvar P1 is a controlled expansion alloy. It is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron. The expansion characteristics of Kovar match both borosilicate (or Pyrex) glasses and alumina ceramics, making it one of the most popular of the controlled expansion alloys for hermetic sealing applications. Kovar is produced to ensure good properties for machining and deep drawing, and is a porosity free product. You’ll find Kovar in applications such as power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.

KOVER ALLOY CHEMISTRY

Element maximum % unless noted

Iron Balance

Nominal Nickel 29

Nominal Cobalt 17

Carbon 0.02

Silicon 0.20

Chromium 0.20

KOVER ALLOY PHYSICAL PROPERTIES
Item Unit Parameter

Density lb/cu in 0.302

Specific Gravity --------- 8.36

Curie Temp °F / °C 815/ 435

Melting Point °F / °C 2640/ 1449

Electrical Resistivity Micro-ohm-cm / Micro-ohm-cm 40/ 294

Thermal Conductivity W/cm °C / BTU-in/sq. ft-hr- 0.17/ 120

Specific Heat Cal/g- °C / BTU/lbm- °F 0.11/ 0.11

Thermal Expansion ppm/°F (75°F to 842°F) / ppm/°C (25°C to 450°F) 2.9/ 5.3

KOVER ALLOY LINEAR COEFFICIENT OF THERMAL EXPANSION

Degree C Value DegreeC Value
30-100 ------ 30-450 5.1 - 5.5

30-150 ------ 30-475 -------

30-200 5.5 30-500 6.2

30-250 ----- 30-525 -------

30-300 5.1 30-550 -------

30-325 ----- 30-600 7.9

30-350 ----- 30-700 9.3

30-375 ----- 30-800 10.4

30-400 4.6 - 5.2 30-900 11.5

30-425 ------ 30-1000 ---------

KOVER ALLOY MECHANICAL PROPERTIES

Item Unit Parameter

Tensile Strength Ksi 75
MPa 518

Yield Strength Ksi 40
MPa 276

Elongation % in 2 in 30

Typical Hardness Ann Rockwell HRB80

Modulus of Elasticity Mpsi 30

KMPa 270

SPECIFICATION
Sheet / bar / wire /tube

APPLICATIONS
Glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves.

KEY FEATURE
Controlled coefficient of expansion (which decreases with rising temperature to the inflection point).

Matches the expansion rate of borosilicate glasses and alumina ceramics.

Detailed Images

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Our Company

XAGY Inc, was establish in 1993, with a company mission to provide a high qulity, reliable source for precision alloy and high temperature alloys in both scientific research and production . This mission continues today, after more than twenty-three years.

XAGY Inc, continuing goal is to supply high quality products, service, and support to our customers at competitive prices. our factory flexibility enables prompt response to any customer's unique needs. We can ship orders faster, you will always be greeted by a competent sales representative during business hours when you call...or email .

our factory was certified by the ISO9001-2008 quality system in June 2005 , it was certified as high-tech factory by Shaanxi Provincial Department of Science & Technology. in same year, Shaanxi Provincial Development and Reform Commission identified the major businesses of the company as the industries that the country mainly encourages and develops.
Throughout our 23+ years of service we have come to be a valued resource for precision alloy for domestic and international manufacturing companies and worldwide, as well as most china government. To pursue excellent and surpass oneself is what XAGY Inc has been striving for. We always follow the principle of "quality and technology first, sincere service and observing the contract" and try our best to develop XAGY Inc into a metallica functional material manufacturer with core competitiveness and continuous capabilities of growth so as to provide all our customers with more and better services and products.

Packing & Delivery

Our most professional packaging

bar packing

flexable international transport cooperation

Our Service

1.Sample free

2, Faster delivery

3, Helpful staff

4, Quick response

6, Testing before shipping

7, We will reply you for your inquiry in 24 hours.

8, Advanced facilities

9. Technical support

10. No min order request

11.Technical Information

If you have a technical question relating to a Controlled Expansion, Electrical/Electronic Nickel, Soft Magnetic or Refractory application, or need assistance with a specific material, you can visit our web or email Ask the Experts service here;

FAQ

1.Q: How can I trust this factory ?

A: Our stock number is 836660(China new stock market), also you can visit our website . Our factory's License and certificate appear on the website.(License Number can check the aptitude of the factory on Chinese Gov web ,English version available )

2. Q: Is this factory far away from the port? Is this will take longer for delivery?

A: From Xi'an to any port in China with in one day, convenient transportation only can improve the delivery.

3. Q: Where is your factory located? How can I visit there?

A: Our factory is located in Xi'an, Shaanxi Province, China.

All our clients from all over the world, are warmly welcome to visit us! Free pick up !

4. Q: How can I get some samples?

A: We are honored to offer you samples.(sample will delivery as our stock size)

5.Q: How does your factory do regarding quality control?

A. Quality is priority. our factory have advanced facilities, High qualified technical personnel and technical support and always attach great importance to quality controlling from beginning to end. All requirements with ASTM, UNS, GOST standards.

6.Q Are you ISO 9001 approved ?

A:Yes,we have held ISO 9001 approval since 2000.

7.Q；How can I pay ?

A: Payment can be made by T/T, L/C, D/A, D/T ,Western Union .

8.What is your minimum order quantity?

A: We can manufactures from as small as few kilogram to your specification.

9.Q：What is your standard of the lead time ?

A: Typical manufacturing lead times are around three working weeks.

If you have an urgent requirement, we have an emergency manufacturing service(EMS)available .

10.Q： Do you offer testing services?

A:Yes ,we can offer test date for you. Although we are not certified by international authority, our equipment is regularly calibrated and certified and our staff are fully competent. We can carry out for you ,using our in-house equipment.

11.Q：Do you deliver worldwide ?

A: Precision alloy supplies customers world wide.by Air, Sea, Ground, We can despatch using your carrier account if you prefer. All products are packed suitably for transportation.

12.Q：Can you make to my specification/drawing ?

A:We do manufacture to individual specifications / drawings. Please send us your specification / drawing for our production team to confirm if we can meet your requirements.

13.Q： Who do I send my enquiry to?

A: Please send your enquiries to Supportsales·

Xi'an GangYan Special Alloy Co,Ltd The factory is researching and producing precision alloy over 23 years , Worldwide Supply and 10000+ clients witness for you .

Our factory is located in Shaaxi Province of China. Our products are all made to satisfy the requirements of the European Union SGS ---RoHs, ISO 90001 and we have both certification. Our advantage lies in strong research-and-development capabilities, abundant materials, highly cost performance, and relevant relations with the factories from all over the world .The table showing is reference Only ,Other shape available as well , also we can tailoring your unique requirements with ASTM, UNS ,GOST,standards, For any Further INFO please feel free to contact us

Contact Us

Xi'an Gangyan Special Alloy Co., Ltd.: Contact nameMichelle Lee
Chat Now; Phone86-29-33669103; AddressNo. 88, East Of Century Avenue

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Product Categories

Elastic Alloy	Expansion alloy	High temperature alloy	invar alloy
Kovar	magnetic core	New Products	Permanent alloy
permanent magnetic alloy	Precision alloy	Soft Magnetic alloy	Stainless steel
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controlled expansion alloy

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